Read the example sentence, and study the chart of word roots.Mia was a normal energetic six-year-old, but she was exceptionally vivacious at her birthday party.Word RootsDefinitionvocvoicevolturnvivlivevotvow

The root viv means “live.” In the sentence, vivacious describes Mia as especially energetic and lively at her birthday party. So “full of liveliness” is the best match; the other choices relate to voice, vows, or turning.

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